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balandron [24]
3 years ago
13

Given that R=3x+9y Find y when x = 7 and R=21

Mathematics
2 answers:
Romashka-Z-Leto [24]3 years ago
7 0

Answer:

y=0

Step-by-step explanation:

R=3x+9y

(given)

21=3(7)+9y

21=21+9y

9y=21-21

9y=0

y=0

taurus [48]3 years ago
7 0

Answer:

y = 0

Step-by-step explanation:

Given

R = 3x + 9y , then

21 = 3(7) + 9y

21 = 21 + 9y ( subtract 21 from both sides )

0 = 9y ( divide both sides by 9 )

y = 0

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4 years ago
3/4(16c+8) - (6c - 8
egoroff_w [7]

Answer:

6c - 2 or 6c + -2

Step-by-step explanation:

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4 0
4 years ago
Read 2 more answers
Use trigonometric identities to transform the left side of the equation into the right side (0 < θ < π/2).
lord [1]
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8 0
3 years ago
Type the correct answer in the box.
Marysya12 [62]

Answer:(-2, 2)

Step-by-step explanation:

7q² - 28 = 0

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7q² - 28 + 28 = 0+ 28

7q² = 28

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8 0
3 years ago
3. Simplify the following. Leave your answer in index form.
Andre45 [30]

Answer:

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= 36

3 0
3 years ago
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